US4232278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power microwave integrated circuit receiver protector with integral sensitivity time control
Assignee: United States Department of the Air Force
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Filing: 1979-07-06
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Granted: 1980-11-04
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Expires: 1999-07-06
Abstract
Abstract PIN diodes of decreasing base region thicknesses, wherein the thickest base region diode functions as a quasi-active limiter with turn-on bias supplied by detected RF current in a Schottky barrier diode with a discharge resistor providing fast recovery; and the thinnest base region PIN diode being a zero bias punch-through type, with a dc sensitivity time control, functioning as a passive limiter during transmit and controlled attenuator during receive provides an improved radar receiver protector circuit. The operation of the PIN diode is enhanced by a unique mounting on a gold-plated copper puck in the circuit board and tuning the signal leads to the diode.
Inventors
- 👤 Michael J. Gawronski
- 👤 Harry Goldie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/10; H01P1/15; H03; H03G; H03G11/00; H03G11/02; H03G11/025
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
220 words
A microwave integrated circuit receiver protector for controlling the input to a radar receiver during periods of transmit and receive comprising: a. a circuit board substrate having a ground plane, a microwave input line, and a microwave output line of substantially the same impedance as the input line; b. an input PIN diode having a predetermined base region thickness coupled to with the said input line; c. means including a Schottky barrier diode coupled to with the said input line and the said input PIN diode for providing turn-on bias to the said input PIN diode; d. means including a discharge resistor coupled to with the said means for providing turn-on bias, and the said input PIN diode for providing fast recovery of the said input PIN diode from the said turn-on bias; e. an output PIN diode having a determined base region thickness that is less than the said input PIN diode base region thickness coupled to with the said output line; f. means for applying a dc voltage to the said output PIN diode whereby the said output PIN diode functions as a passive limiter during the transmit period and a controlled sensitivity time controlled attenuator during receive; and g. means including a limiting PIN diode coupling the said input PIN diode to the said output PIN diode.
Claim 2
Dependent Claim
220 words
A microwave integrated circuit receiver protector for controlling the input to a radar receiver during periods of transmit and receive comprising: a. a circuit board substrate having a ground plane, a microwave input line, and a microwave output line of substantially the same impedance as the input line; b. an input PIN diode having a predetermined base region thickness coupled to with the said input line; c. means including a Schottky barrier diode coupled to with the said input line and the said input PIN diode for providing turn-on bias to the said input PIN diode; d. means including a discharge resistor coupled to with the said means for providing turn-on bias, and the said input PIN diode for providing fast recovery of the said input PIN diode from the said turn-on bias; e. an output PIN diode having a determined base region thickness that is less than the said input PIN diode base region thickness coupled to with the said output line; f. means for applying a dc voltage to the said output PIN diode whereby the said output PIN diode functions as a passive limiter during the transmit period and a controlled sensitivity time controlled attenuator during receive; and g. means including a limiting PIN diode coupling the said input PIN diode to the said output PIN diode.
Claim 3
Dependent Claim
53 words
The receiver protector as claimed in claim 1 wherein the said substrate has hole recesses and the said PIN diodes are each attached to gold-plates copper pucks positioned in a respective said hole in the said substrate and the said puck is bonded with gold bonding straps to the said substrate ground plane.
Claim 4
Dependent Claim
64 words
The receiver protector as claimed in claim 2 wherein the said PIN diodes have a gold-plates N + side and a P + side with conductor leads connected to the P + side, the gold-plated N + side soldered to the gold-plated copper puck and the said conductor leads connected to the P + side of the PIN diode resonating the said PIN diode.
References Cited (Backward Citations)
US2798186A
Cited
US3452299A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-04 | 1984-05-05 | 1984-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-04 | 1988-05-05 | 1988-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-04 | 1992-05-05 | 1992-11-04 | $7700.00 | Window Closed / Lapsed |